/// <summary>
/// It open dialog to load a PDF File
/// </summary>
private void OpenDocument()
{
OpenFileDialog openFileDialog = new OpenFileDialog();
if (openFileDialog.ShowDialog() == true)
{
try
{
var doc = new PDFDoc(openFileDialog.FileName);
doc.InitSecurityHandler();
PDFViewer.CurrentDocument = doc;
_undoManager = doc.GetUndoManager(); // Get document Undo Redo Manager
NotifyPropertyChanged(nameof(ToolsEnabled));
}
catch (Exception)
{
throw new Exception("OpenDocument() failed");
}
}
}
/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main(string[] args)
{
// The first step in every application using PDFNet is to initialize the
// library and set the path to common PDF resources. The library is usually
// initialized only once, but calling Initialize() multiple times is also fine.
PDFNet.Initialize();
// Relative path to the folder containing test files.
string input_path = "../../TestFiles/";
string output_path = "../../TestFiles/Output/";
try
{
// Open the PDF document.
using (PDFDoc doc = new PDFDoc(input_path + "newsletter.pdf"))
using (ElementBuilder bld = new ElementBuilder()) // Used to build new Element objects
using (ElementWriter writer = new ElementWriter()) // Used to write Elements to the page
{
UndoManager undo_manager = doc.GetUndoManager();
// Take a snapshot to which we can undo after making changes.
ResultSnapshot snap0 = undo_manager.TakeSnapshot();
DocSnapshot snap0_state = snap0.CurrentState();
Page page = doc.PageCreate(); // Start a new page
writer.Begin(page); // Begin writing to this page
// ----------------------------------------------------------
// Add JPEG image to the file
Image img = Image.Create(doc, input_path + "peppers.jpg");
Element element = bld.CreateImage(img, new Matrix2D(200, 0, 0, 250, 50, 500));
writer.WritePlacedElement(element);
writer.End(); // Finish writing to the page
doc.PagePushFront(page);
// Take a snapshot after making changes, so that we can redo later (after undoing first).
ResultSnapshot snap1 = undo_manager.TakeSnapshot();
if (snap1.PreviousState().Equals(snap0_state))
{
Console.WriteLine("snap1 previous state equals snap0_state; previous state is correct");
}
DocSnapshot snap1_state = snap1.CurrentState();
doc.Save(output_path + "addimage.pdf", SDFDoc.SaveOptions.e_incremental);
if (undo_manager.CanUndo())
{
ResultSnapshot undo_snap = undo_manager.Undo();
doc.Save(output_path + "addimage_undone.pdf", SDFDoc.SaveOptions.e_incremental);
DocSnapshot undo_snap_state = undo_snap.CurrentState();
if (undo_snap_state.Equals(snap0_state))
{
Console.WriteLine("undo_snap_state equals snap0_state; undo was successful");
}
if (undo_manager.CanRedo())
{
ResultSnapshot redo_snap = undo_manager.Redo();
doc.Save(output_path + "addimage_redone.pdf", SDFDoc.SaveOptions.e_incremental);
if (redo_snap.PreviousState().Equals(undo_snap_state))
{
Console.WriteLine("redo_snap previous state equals undo_snap_state; previous state is correct");
}
DocSnapshot redo_snap_state = redo_snap.CurrentState();
if (redo_snap_state.Equals(snap1_state))
{
Console.WriteLine("Snap1 and redo_snap are equal; redo was successful");
}
}
else
{
Console.WriteLine("Problem encountered - cannot redo.");
}
}
else
{
Console.WriteLine("Problem encountered - cannot undo.");
}
}
}
catch (PDFNetException e)
{
Console.WriteLine(e.Message);
}
}
public MainViewModel()
{
// Initilizes PDFNet
PDFNet.Initialize();
// Make sure to Terminate any processes
Application.Current.SessionEnding += Current_SessionEnding;
// Init all Commands
CMDOpenDocument = new Relaycommand(OpenDocument);
CMDNextPage = new Relaycommand(NextPage);
CMDPreviousPage = new Relaycommand(PreviousPage);
// Annotations
CMDAnottateText = new Relaycommand(AddTextSample);
CMDFreeTextCreate = new Relaycommand(AddFreeTextSample);
CMDSelectText = new Relaycommand(SelectText);
CMDSquareCreate = new Relaycommand(AddSquareAnnotation);
CMDArrowCreate = new Relaycommand(AddArrowAnnotation);
CMDOvalCreate = new Relaycommand(AddOvalAnnotation);
CMDSquigglyCreate = new Relaycommand(AddSquigglyAnnotation);
CMDUnderlineCreate = new Relaycommand(AddUnderlineAnnotation);
CMDStrikeoutCreate = new Relaycommand(AddStrikeoutAnnotation);
CMDTextHighlightCreate = new Relaycommand(AddHighlightAnnotation);
CMDInkCreate = new Relaycommand(AddInkAnnotation);
CMDExit = new Relaycommand(ExitApp);
CMDZoomIn = new Relaycommand(ZoomIn);
CMDZoomOut = new Relaycommand(ZoomOut);
CMDUndo = new Relaycommand(Undo);
CMDRedo = new Relaycommand(Redo);
// Checks the scale factor to determine the right resolution
PresentationSource source = PresentationSource.FromVisual(Application.Current.MainWindow);
double scaleFactor = 1;
if (source != null)
{
scaleFactor = 1 / source.CompositionTarget.TransformFromDevice.M11;
}
// Set working doc to Viewer
PDFViewer = new PDFViewWPF();
PDFViewer.PixelsPerUnitWidth = scaleFactor;
PDFViewer.SetPagePresentationMode(PDFViewWPF.PagePresentationMode.e_single_continuous);
PDFViewer.AllowDrop = true;
// PDF Viewer Events subscription
PDFViewer.MouseLeftButtonDown += PDFView_MouseLeftButtonDown;
PDFViewer.Drop += PDFViewer_Drop;
// Enable access to the Tools available
_toolManager = new ToolManager(PDFViewer);
_toolManager.AnnotationAdded += _toolManager_AnnotationAdded;
_toolManager.AnnotationRemoved += _toolManager_AnnotationRemoved;
// Load PDF file
PDFDoc doc = new PDFDoc("./Resources/GettingStarted.pdf");
doc.InitSecurityHandler();
_undoManager = doc.GetUndoManager();
PDFViewer.SetDoc(doc);
}